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Important Questions

Unitary Method — Important Questions

ICSE · Class 7 · Mathematics

42 important questions from Unitary Method for ICSE Class 7 Mathematics, with answers. Includes multiple choice and multiple correct questions.

42 questions20 flashcards10 formulas & key relations5 concepts

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42 Questions·
multiple choicemultiple correct

Important Questions from Unitary Method

1multiple choice
3 marks

Ajay and Vijay together paint a hall in 6 days. Ajay alone paints it in 8 days. In how many days can Vijay alone paint the hall?

Show answer

24 days

Ajay and Vijay together paint 1/6 of the hall in 1 day. Ajay paints 1/8 of the hall in 1 day. Vijay's 1 day's work = 1/6 - 1/8 = 4/24 - 3/24 = 1/24. So Vijay alone takes 24 days.

2multiple choice
3 marks

A and B can do a piece of work in 15 days and 20 days respectively. How much work will be left after A works alone for 3 days?

Show answer

4/5 of the work

A's 1 day's work = 1/15. In 3 days, A completes 3 x 1/15 = 1/5 of the work. Work left = 1 - 1/5 = 4/5. So 4/5 of the work is left.

3multiple choice
3 marks

A man earns ₹400 in 10 days. Using the unitary method, how much will he earn in 28 days?

Show answer

₹1,120

In 10 days, earnings = ₹400. In 1 day, earnings = ₹400/10 = ₹40. In 28 days, earnings = 28 x ₹40 = ₹1,120. So the answer is ₹1,120.

4multiple choice
3 marks

0.75 m of cloth costs ₹45. What is the cost of 0.6 m of the same cloth?

Show answer

₹36

0.75 m costs ₹45, so 1 m costs ₹45/0.75 = ₹60. Then 0.6 m costs 0.6 x ₹60 = ₹36. So the answer is ₹36.

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What are the important topics in Unitary Method for ICSE Class 7 Mathematics?
Key topics in Unitary Method include Core Idea of the Unitary Method, Direct Variation, Inverse Variation, Worked Examples from Direct Variation. Study these first, then practise questions on each for Class 7 exams.
How many important questions are there in Unitary Method?
Super Tutor has 42 practice questions for Unitary Method, including multiple choice, multiple correct questions. A sample with answers is on this page.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All ICSE Class 7 Mathematics Important Questions

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